Manufacturer · France
Saft (TotalEnergies)
BNEF Tier 1French battery maker (TotalEnergies subsidiary, founded 1918) with an ESS installed base it puts at 7.5 GWh in 30+ countries. Current utility product: Intensium Flex liquid-cooled LFP DC container (3.4/4.3/5.1 MWh); Intensium Shift (3–3.3 MWh) and Intensium Max 20 HE (2.5 MWh) are earlier generations now visible only in press releases.
- Country
- France
- Headquarters
- Levallois-Perret (Paris)
- Founded
- 1918
- Official website
- saft.com
- Segments
- utility-scale · commercial & industrial
- Makes its own cells
- yes
- BNEF Tier 1
- BNEF Tier 1 (bankability list)
Model
3
3 models
Classes represented
5 MWh 20 ft containersLiquid-cooled utility systemsNon-LFP chemistry
Saft (TotalEnergies) models in the catalog
Sorted by maximum published energy. Click a model for all variants, the full specification and the list of fields Saft (TotalEnergies) does not publish.
| Model | Segment | Form factor | Max energy | Max power | Cooling | Chemistry | Cell Ah | AC/DC | Status | Datasheet |
|---|---|---|---|---|---|---|---|---|---|---|
| Intensium Flex (I-Flex) DC | utility-scale | 20 ft container | 5.1 MWh | not published | liquid-cooled | LFP | not published | DC | shipping | — |
| Intensium Shift (I-Shift / I-Shift+) | utility-scale | 20 ft container | 3.3 MWh | not published | not published | LFP | not published | DC | legacy | — |
| Intensium Max 20 High Energy | utility-scale | 20 ft container | 2.5 MWh | 1.2 MW | not published | other | not published | DC | legacy | — |
About Saft (TotalEnergies)
Saft Groupe SAS (Levallois-Perret, France; wholly owned by TotalEnergies) has manufactured industrial batteries since 1918 and containerized Li-ion storage since 2012, with manufacturing hubs for ESS in France, the US (Jacksonville) and China. Its current building block is the Intensium Flex (I-Flex): a liquid-cooled LFP DC container rated 3.4, 4.3 or 5.1 MWh, launched May 2025 with production from end 2025 and an AC version announced for 2026; in April 2026 it passed large-scale fire testing to ANSI/CAN/UL 9540A:2026 with 15 cm container spacing. Earlier generations — Intensium Shift (3.0 MWh, 2022; I-Shift+ 3.3 MWh, 2024) and Intensium Max 20 High Energy (1.2 MW/2.5 MWh, 2019) — no longer have product pages and are recorded as legacy from press releases. Saft states 85–90% AC round-trip efficiency, up to 20-year life and >97% availability for its ESS in general, but publishes few per-model figures on open pages: no kW ratings, DC voltage, dimensions, weight, cell format, cycle life or warranty. An I-Flex DC datasheet is linked from the Intensium page, but the saft.com download endpoint returned HTTP 504 throughout this survey, so its contents could not be captured. Press releases carry images; no explicit reuse licence was found.
Photo policy
Saft (TotalEnergies) provides press-kit imagery under press terms; model cards show those photos with credit and a link to the source.
Press releases in Saft's newsroom include images; no explicit media licence text found. Product images not captured (I-Flex page uses project photos).
Sources
Manufacturer documents used for this record. Model-level sources are listed on each model card.
- Saft — Intensium Energy Storage Systems — https://saft.com/en/intensium-energy-storage-systems
- Saft — Energy Storage market sector — https://saft.com/en/market-sectors/energy-storage
- Saft — Press releases — https://saft.com/en/newsroom/press-releases